Huawei SUN2000P-450W-P2 User manual

HUAWEI DIGITAL POWER TECHNOLOGIES CO., LTD.
SUN2000-(600W-P, 450W-P2) Smart PV Optimizer
Quick Guide
Issue: 03
Part Number: 31500GLF
Date: 2022-07-29

1Copyright © Huawei Digital Power Technologies Co., Ltd. 2022.
All rights reserved.
The Smart PV Optimizer is a DC-DC converter installed on the rear of PV modules in a PV system. It
manages the maximum power point (MPP) of each PV module to improve the energy yield of the
PV system, and performs functions such as module-level shutdown and module-level management.
1Product Overview
Mounting bracket
SUN2000-600W-P (Short Input Cable)/SUN2000-450W-P2
SUN2000-600W-P (Long Input Cable)
The length of the input power cable delivered with the optimizer is 150 mm. Select PV modules
with appropriate cable length to ensure that the optimizer can connect to PV modules.
The length of the input power cable delivered with the optimizer is 1000 mm. Select PV modules
with appropriate cable length to ensure that the optimizer can connect to PV modules.
Type II apparatus
(enhanced insulation)
Burn
warning
Electric shock
warning
EU waste electrical and
electronic equipment (WEEE)
mark
Refer to
documentation
Type II apparatus
(enhanced insulation)
Burn
warning
Electric shock
warning
EU waste electrical and
electronic equipment (WEEE)
mark
Refer to
documentation
Mounting bracket

2
2Installing the Device
Installation Requirements
2.1
Clearance
2. Improper operations during the
installation and running of optimizers
may cause fire. Do not store flammable
or explosive materials in the installation
area.
1. Do not install the optimizers in a position
that might be soaked in water for two
hours or longer.
Water
Cable
cutter
3. Do not cut the cables delivered with the
optimizers. Otherwise, the warranty will be
voided.
4. Avoid direct sunlight.

3
Flange nut
Installed on an Extruded Aluminum
Profile –T-shaped Bolt
M8x20 T-shaped bolt
Extruded
aluminum
profile
•The optimizer is mounted to an aluminum
profile on the front or rear side with T-
shaped bolt and nut.
•The T-shaped bolt and nut need to be
purchased separately from Huawei. The
bolt dimensions are as follows.
Installed on a PV Module
Frame –Bolt Assembly
M8x20 bolt assembly
Flange nut
Before installation, ensure that a
mounting hole has been reserved on
the PV module frame.
The bolt assembly and nut need to be
purchased from a third party. Ensure
that the length meets the installation
requirements of the PV module frame.
PV module
2. Install the optimizer based on the selected installation mode.
Properly plan the installation position of optimizers to ensure that the cables between the
optimizer and the PV module and between adjacent optimizers can be properly connected, and the
maximum communication distance between the optimizer and the solar inverter is within 350 m.
1. After determining the installation position of the optimizer, remove the SN label from the
optimizer and attach it to the physical layout template. For details, see instructions on the
back of the physical layout template.
Installing the Optimizer
2.2

4
Installed on a PV Module Frame –Frame Mounting Bracket (Front-mounted)
Do not press the optimizer
mounting ear against the
positioning pole of the frame
mounting bracket.
Purchase the frame mounting
bracket separately from Huawei.
Install the PV module after the
optimizer is installed.
PV module
Frame mounting bracket
3Installing the Optimizer Cables
1. Connect the optimizer
input (IN) cable to
the PV module
connection box.
2. Connect the positive probe of the multimeter to the positive
output terminal of the optimizer and the negative probe to the
negative output terminal. Check the output voltage and
resistance of a single optimizer.
PV module connection box
Resistance
Cause
Suggestions
0.9 kΩ ≤ R1 ≤ 1.1 kΩ
The optimizer is normal.
N/A
R1 < 0.9 kΩ
If the probes of the
multimeter are correctly
connected, the optimizer is
faulty.
Replace the optimizer.
1.1 kΩ < R1

The sunlight is weak.
The optimizer input is not
connected.

The optimizer output is
connected to the PV
module output.

The optimizer is faulty.
1. Measure the resistance when the sunlight is
sufficient.
2.
Connect the optimizer input power cables.
3.
Correct the optimizer cable connection.
Connect the optimizer input power cables to
the output cables of the PV module.
4.
If the resistance is still abnormal, replace
the optimizer.
•The voltage V1 is 0 V.
•The resistance R1 is 1 kΩ (±10%).
If the probes are reversely connected,
the measured resistance is less than
the resistance measured when the
probes are correctly connected, which
might be less than 0.9 kΩ.
Ensure that the input (IN) and output (OUT) cables of the optimizer are correctly connected. If
they are reversely connected, the device may be damaged.

5
Full Configuration of Optimizers
3. Check that the optimizer input is properly connected, and connect the output power cables
to the optimizer. Measure the PV string resistance when the sunlight is sufficient.
PV string
Common Exception Scenarios
The probes are
reversely connected.
The measured value
R2 is less than the
resistance measured
when the probes are
correctly connected.
The sunlight is weak:
1.1 kΩ < R1
The optimizer input
is not connected:
1.1 kΩ < R1
The optimizer
output is connected
to the PV module
output:
1.1 kΩ < R1
The measurement precision of the PV string output resistance depends on the resistance setting
of the multimeter. Select the lowest resistance setting that can meet the measurement
requirements.

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Solar inverter
4. Connect cables between the PV string and the solar inverter.
4Power-On Commissioning
1. The physical layout of the optimizers must be provided so that you can easily locate faulty
optimizers based on the physical layout diagram.
2. The physical layout of the optimizers must be provided to use the optimizer disconnection
detection function. After optimizer disconnection detection is performed, the locating result
can be viewed on the Optimizer layout page.
3. Choose Maintenance > Subdevice management > Auto search to add an optimizer. Create
a physical layout on the Physical layout design screen. For details, see the corresponding
solar inverter quick guide or FusionSolar App Quick Guide . The solar inverter quick guide is
delivered with the solar inverter. You can scan the QR code to obtain FusionSolar App Quick
Guide .
Physical
layout
PV rooftop
Location
Faulty optimizer
Disconnection icon Fault icon
PV string PV string
a. If R is infinite, an open circuit occurs in the PV string or
the cables are connected to different PV strings. Rectify
the PV string open-circuit fault and correctly group the PV
string cables.
b. If R4 is less than R3, A is the positive cable of the PV
string, and B is the negative cable of the PV string. If R3 is
less than R4, B is the positive cable of the PV string, and A
is the negative cable of the PV string. Attach correct cable
labels.
c. The resistance of each pair of PV module and optimizer is
1 kΩ. The total resistance of a PV string is 1 kΩ times the
number of optimizers. If the total resistance is 10 kΩ, the
number of optimizers in the PV string is 10.
Note: The total resistance of a PV string is (R3 + R4)/2.

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1. Open the FusionSolar app, log in to intl.fusionsolar.huawei.com using the installer account,
choose Me > Device Commissioning, and connect to the WLAN hotspot of the solar inverter.
2. Select installer and enter the login password. Click Log In. The device commissioning screen
is displayed.
3. Choose Device Monitoring, select the PV string and check the optimizer status.
5Troubleshooting
Optimizer status
Status
Description
Green
The optimizer is running properly.
Gray
The optimizer is offline.
Check that the SN
and location information are correct and
search for the device again.
Red
The optimizer is faulty.
Fault
Alarm
Cause
Suggestions
Input
overvoltage
Optimizer input
overvoltage
occurred.
Check whether the open
-circuit voltage of the PV module
connected to the optimizer exceeds 80 V.
Overtemperature
protection
The optimizer
internal
temperature is
too high.
1.
Check the ventilation and ambient temperature at the
optimizer installation position. If the ventilation is poor or the
ambient temperature exceeds the upper threshold, improve
the ventilation and heat dissipation.
2.
If the ventilation and ambient temperature are normal,
contact your dealer or Huawei technical support.
Internal
hardware fault
An internal fault
occurred in the
optimizer.
Contact your dealer or Huawei technical support.
Output backfeed
Optimizer
output backfeed
occurred.
1.
Check whether PV modules are severely blocked when PV
strings are connected in parallel.
2.
If the fault persists, contact your dealer or Huawei technical
support.
Abnormal output
voltage
The optimizer
output voltage
is abnormal.
1.
When the sunlight is normal, perform the optimizer search
function again.
2. Check whether the optimizer output extension cable is correct
(positive connector at one end and negative connector at the
other).
3.
Check whether the PV string is correctly connected to the
inverter or whether there is a breakpoint in the PV string.
4.
If the fault persists, contact your dealer or Huawei technical
support.
If the system has change requirements, such as adding, deleting, and replacing an optimizer,
adjusting the physical position of an optimizer, or adjusting the PV string connected to the solar
inverter input, power off the inverter and wait for 5 minutes before performing the change
operation to avoid human injuries. After the change is performed, the optimizer search process
must be performed again and the physical layout diagram must be updated. Otherwise, the
networking is incomplete, optimizer faults cannot be located, or the system fails.

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6Replacing an Optimizer
1. Power off the solar inverter and remove
the faulty optimizer.
2. Install a new optimizer and correctly
connect its cables.
3. Power on the solar inverter. On the Device
Commissioning screen, choose
Maintenance > Subdevice management,
and tap Auto search to add the new
optimizer.
4. On the Device Commissioning screen,
choose Maintenance > Optimizer layout,
select the corresponding PV module, and
bind the new optimizer. Click Submit.
1
2
3
4
7Precautions
Fault
Alarm
Cause
Suggestions
Upgrade failed
The optimizer
software
upgrade failed.
1. When the sunlight is normal, perform the optimizer upgrade
again.
2.
If the fault persists, contact your dealer or Huawei technical
support.
Scenario
Optimizer
Energy
Storage
Description
Off-grid No Yes
Optimizers are not supported.
On/Off-
grid Yes No
After the power grid fails, the system switches to the off
-grid
mode and is powered off at night. If the power grid is not
recovered on the next day, the system cannot start
automatically when the irradiance is normal. After the power
grid recovers and the irradiance is normal, the system
automatically starts.
On/Off-
grid Yes Yes
•
After the power grid fails, the system switches to the off-
grid
mode. If the battery end-of-
discharge SOC is greater than or
equal to 5%, the system shuts down at night when the SOC
reaches the lower limit. If the power grid is not recovered on
the next day, the system can black start through battery
when the irradiance is normal.
•
After the power grid fails, the system switches to the off-
grid
mode. If the battery end-of-
discharge SOC is less than to 5%,
the system shuts down at night when the SOC reaches the
lower limit. If the power grid is not recovered on the next
day, the system may fail to black start through battery when
the irradiance is normal. After the power grid recovers and
the irradiance is normal, the system automatically starts.

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The information in this document is subject to change without notice. Every effort has been
made in the preparation of this document to ensure accuracy of the contents, but all
statements, information, and recommendations in this document do not constitute a
warranty of any kind, express or implied.
Only qualified and trained electrical technicians are allowed to operate the device. Operation
personnel should understand the composition and working principles of the grid-tied PV
power system and local regulations.
Carefully read this document prior to installation to get familiar with product information
and safety precautions. Huawei shall not be liable for any consequence caused by violation of
the storage, installation, and operation regulations specified in this document and the solar
inverter user manual.
Use insulated tools when installing the device. For personal safety, wear proper personal
protective equipment (PPE).
If an optimizer does not connect to any other device, connect the OUT+ and OUT–ports of
the optimizer respectively to the IN+ and IN–ports to protect the terminals from water.
It is recommended that the positive and negative cables (PV+/PV–) between the optimizer
and the solar inverter be placed side by side to avoid cable winding.
The input end of the optimizer should be connected to the PV module connection box, and
the output end to the adjacent optimizer or a solar inverter. Do not reversely connect the
input and output cables. Otherwise, the optimizer may be damaged.
The screenshots are for reference only. The actual screens may vary. Local physical layout
using the solar inverter is used as an example. For details about the remote physical layout
using the management system, see the FusionSolar App Quick Guide .
8Installation Video
You can scan the QR codes below to obtain the installation videos.
English
The optimizer uses Staubli MC4 DC connectors. Ensure that the DC connectors to be connected
are of this model. If the DC connectors to be connected are not of the Staubli MC4 model, the
connector compatibility report and third-party lab (TUV, VED, or Bureau Veritas) report from
the DC connector manufacturer must be available. Using incompatible DC connectors may
result in serious consequences. The resulting device damage is beyond the warranty scope.
The optimizer is not supported in the pure off-grid ESS networking. Otherwise, the system may
fail to start.
Partial configuration scenario: The total open-circuit voltage of the PV modules in a PV string
cannot exceed the maximum input voltage of the solar inverter under any condition.

Huawei Digital Power Technologies Co., Ltd.
Huawei Digital Power Antuoshan Headquarters, Futian
Shenzhen 518043, People's Republic of China
solar.huawei.com